CN114979876A

CN114979876A - Earphone device

Info

Publication number: CN114979876A
Application number: CN202210064272.2A
Authority: CN
Inventors: 唐泽孝行; 高桥智也
Original assignee: Sintai Optical Shenzhen Co Ltd; Asia Optical Co Inc
Current assignee: Sintai Optical Shenzhen Co Ltd; Asia Optical Co Inc
Priority date: 2021-02-20
Filing date: 2022-01-20
Publication date: 2022-08-30
Also published as: JP7340048B2; TW202234898A; TWI746378B; JP2022128410A; EP4047948A1; US11735154B2; US20220270585A1

Abstract

An earphone device comprises a shell, a sound production device and a first shielding device. The sound generating device comprises a first loudspeaker, the first loudspeaker comprises a vibrating plate, the vibrating plate comprises a first sound generating surface and a second sound generating surface, the first sound generating surface faces the outside of the shell, and the second sound generating surface faces back to the first sound generating surface. The first shielding device comprises a first portion, a second portion, a first surface and a second surface, the first surface faces the first sound-emitting surface, the second surface faces away from the first surface, the first portion is arranged between the first surface and the second surface, the first portion is fixed on the cover plate, and the second portion faces away from the first portion and faces towards the outside of the shell.

Description

Earphone device

Technical Field

The present invention relates to an earphone device, and more particularly, to an earphone device using an acoustic lens to improve sound quality.

Background

The sound wave generated by the speaker is a spherical wave, and when the speaker is listening indoors, the distance between the speaker and the human ear is far, in this case, the curvature of the spherical wave becomes large, and when the spherical wave reaches the human ear, the spherical wave approaches to a plane wave, however, for the earphone device with the front positioning feature, the sound wave reaches the human ear in the form of the spherical wave because the earphone device is near the human ear, the balance between the bass and the treble changes, and the sound quality is affected.

Disclosure of Invention

The present invention is directed to solve the above-mentioned problems of the prior art, and provides an earphone device, in which the propagation of sound waves is delayed at the edge by an acoustic lens, so that the sound waves reach the human ear relatively close to plane waves.

The technical scheme adopted by the invention for solving the technical problem is to provide an earphone device which comprises a shell, a sound generating device and a first shielding device. The shell comprises a shell body and a cover plate, wherein the cover plate comprises a first surface and a second surface, the first surface faces the shell body and is combined with the shell body to form an inner space of the shell body, and the second surface faces away from the first surface and is far away from the shell body to be outside. The sound generating device comprises a first loudspeaker, the first loudspeaker comprises a vibrating plate, the vibrating plate comprises a first sound generating surface and a second sound generating surface, the first sound generating surface faces the outside, and the second sound generating surface faces back to the first sound generating surface. The first shielding device comprises a first portion, a second portion, a first surface and a second surface, the first surface faces the first sound-emitting surface, the second surface faces away from the first surface, the first portion is arranged between the first surface and the second surface, the first portion is fixed on the cover plate, the second portion faces away from the first portion, and the cover plate is far away from the outside.

The sound generating device further comprises a second loudspeaker and a third loudspeaker, wherein a projection area of the second loudspeaker on the cover plate is provided with a first central point, a projection area of the third loudspeaker on the cover plate is provided with a second central point, and a perpendicular bisector of a connecting line of the first central point and the second central point passes through the first loudspeaker.

The earphone device of the present invention may further include a second shielding device, the cover plate further includes a supporting member, the supporting member includes an end portion, the end portion is connected to the second surface of the cover plate, the second shielding device includes a third portion and a fourth portion, the third portion is fixed to the end portion of the supporting member, and the fourth portion is disposed opposite to the third portion and away from the end portion.

The second shielding device is arranged between the first shielding device and the vibrating plate of the first loudspeaker, the first sound-emitting surface of the vibrating plate of the first loudspeaker faces towards the first shielding device and the second shielding device at the same time, and the first sound-emitting surface is closer to the second shielding device and farther from the first shielding device.

Wherein the ratio of the width to the height of the first shielding device ranges from 2.57 to 3.43, and the ratio of the width to the height of the second shielding device ranges from 2.61 to 3.47.

Wherein the sound generating device further comprises a magnetic return system, the magnetic return system comprises a magnet, the magnet is provided with a third surface and a fourth surface, the third surface of the magnet faces the second sound generating surface of the vibrating plate, the fourth surface of the magnet faces away from the third surface of the magnet, and the third surface of the magnet and the first surface of the first shielding device form an included angle smaller than 90 degrees.

Or, the earphone device of the invention comprises a shell, a sound generating device and a first shielding device. The shell comprises a shell body and a cover plate, wherein the cover plate comprises a first surface and a second surface, the first surface faces the shell body and is combined with the shell body to form an inner space of the shell body, the second surface faces back to the first surface and is far away from the shell body to be outside, and a first sound hole is formed in the cover plate. The sound generating device comprises a first loudspeaker, the first loudspeaker comprises a vibrating plate, the vibrating plate comprises a first sound generating surface and a second sound generating surface, the first sound generating surface faces the first surface, and the second sound generating surface faces back to the first sound generating surface. The first shielding device is arranged at the periphery of the first sound hole and comprises a first part, a second part, a first surface and a second surface, the first surface is close to the first sound hole, the second surface faces back to the first surface, the first part is arranged between the first surface and the second surface, the first part is fixed on the cover plate, and the second part faces back to the first part and faces the outside.

The sounding device further comprises a magnetic return system, the magnetic return system comprises a magnet, the magnet is provided with a third surface and a fourth surface, the third surface of the magnet faces the second sounding surface of the vibrating plate, the fourth surface of the magnet faces away from the third surface of the magnet, and the third surface of the magnet and the first surface of the first shielding device form an included angle smaller than or equal to 90 degrees.

Wherein the ratio of the width to the height of the first shielding device is 1.33 to 1.78 or 2.13 to 2.85.

Wherein the first shielding device comprises a sound wave shielding plate.

The earphone device has the following beneficial effects: the propagation of the sound wave is delayed at the edges by the acoustic lens so that the sound wave approaches the human ear closer to a plane wave.

Drawings

Fig. 1 is a perspective view of an earphone device according to an embodiment of the present invention.

Fig. 2 is a top view of the earphone device of fig. 1.

Fig. 3 is a schematic view of the earphone device cut along fig. 2 III-III.

Fig. 4 is a schematic view of the earphone device cut along fig. 2 IV-IV.

Fig. 5 is a schematic view of the earphone device cut along the line of fig. 2V-V.

Detailed Description

Referring to fig. 1, fig. 1 is a perspective view of an earphone device according to an embodiment of the present invention. The earphone device 2 includes an ear cup (not shown), a housing 20, a sound generating device, and a plurality of

shielding devices

22, 23, 25, and 26. The earmuff is connected to the shell 20, and is usually made of a soft material (e.g., sponge) and can be attached to the ear of the user. In the present embodiment, the sound generating device includes a tweeter 21, a woofer 24 (shown in fig. 4 and 5), and a cross-feed speaker (not shown), and the

shielding devices

22, 23, 25, and 26 are acoustic lenses and include acoustic wave shielding plates. When the earphone device is used, sound waves generated by the tweeter 21 pass through the shielding device 23 and the shielding device 22 in this order and reach the ear canal of the user, while sound waves generated by the woofer 24 pass through the shielding device 25 and the shielding device 26 and reach the ear canal of the user. The arrangement and function of the components are described in detail below:

referring to fig. 1, 2 and 3, fig. 2 is a top view of the earphone device of fig. 1, fig. 3 is a schematic diagram of the earphone device cut along the section of fig. 2III-III, as shown, the housing 20 includes a housing body 204 and a cover plate 203, wherein the housing body 204 has a substantially ㄩ -shaped cross section and has a bottom 2045 and a peripheral portion 2046, one side of the peripheral portion 2046 is connected with the bottom 2045 to form a closed side, and the other side opposite to the closed side is an open side, the cover plate 203 is disposed on the open side and has a first surface 2034 and a second surface 2033, wherein the first surface 2034 faces the housing body 204 and is joined with the housing body 204 to form an inner space 2048 of the housing 20, and the second surface 2033 of the cover plate 203 faces away from the first surface 2034 and is away from the housing body 204 to form an outer portion 2049. The peripheral portion 2046 of the housing body 204 is provided with a mounting hole 2047, and the earphone device 2 further includes a support (not shown) extending along the peripheral portion 2046 of the housing body 204 outside the housing 20, and the end of the support is connected to the mounting hole 2047.

Referring to fig. 2, a projection area 2032 of the woofer 24 on the cover 203 has a first center point C2, a projection area 2031 of the cross-feed speaker (not shown) on the cover 203 has a second center point C1, in the present embodiment, a vertical plane P connecting a line L between the first center point C2 and the second center point C1 passes through the tweeter 21, and the tweeter 21 is disposed near the mounting hole 2047.

The tweeter 21 is disposed in the internal space 2048, and includes a diaphragm 211 and a magnetic return system 213, wherein the diaphragm 211 includes a first sound emission surface 2111 and a second sound emission surface 2113, the first sound emission surface 2111 faces the outside 2049 of the housing body 204, and the second sound emission surface 2113 faces the internal space 2048 away from the first sound emission surface 2111. The magnetic return system 213 is disposed on the side of the second sound emission surface 2113 and includes a magnet having a third surface 2133 and a fourth surface 2131, the third surface 2133 of the magnet facing the second sound emission surface 2113 of the diaphragm 211, and the fourth surface 2131 of the magnet facing away from the third surface 2133 of the magnet.

The shielding device 23 includes a third surface 231, a fourth surface 232, a third portion 234 and a fourth portion 233, wherein the third surface 231 is close to the first sound emitting surface 2111 of the vibration plate 211, the fourth surface 232 is disposed opposite to the third surface 231, the third portion 234 is disposed between the third surface 231 and the fourth surface 232 and fixed to the cover plate 203, and the fourth portion 233 is disposed between the third surface 231 and the fourth surface 232 and disposed opposite to the third portion 234 and away from the cover plate 203.

The shielding device 22 includes a first surface 221, a second surface 222, a first portion 224 and a second portion 223, wherein the first surface 221 is close to the fourth surface 232 of the shielding device 23, the second surface 222 is disposed opposite to the first surface 221, the first portion 224 is disposed between the first surface 221 and the second surface 222 and fixed to the cover plate 203, and the second portion 223 is disposed between the first surface 221 and the second surface 222 and disposed opposite to the first portion 224 and away from the cover plate 203.

The cover 203 further includes two parallel supporting members 27 (fig. 1 and 3) and a receiving space 2035 (fig. 3), wherein each supporting member 27 includes an end 271, the end 271 is connected to the second surface 2033 of the cover 203 (the link is near the shielding device 22), and the supporting member 27 is elongated and spans over the vibration plate 211 of the tweeter 21. In addition, although two supporting members 27 are shown in fig. 1 to support the shielding device 23 at the same time, it is understood that the present invention is not limited thereto, and it is also within the scope of the present invention to modify only the supporting members to support the shielding device 23. The receiving space 2035 includes a slope 2036, and the tweeter 21 is inserted into the receiving space 2035 and contacts the slope 2036.

In the present embodiment, the shielding device 22 is disposed on the side of the fourth surface 232 of the shielding device 23 and fixed on the groove 2037 of the cover plate 203. The shielding device 23 is disposed between the shielding device 22 and the diaphragm 211 of the tweeter 21, wherein the first sound emitting surface 2111 of the diaphragm 211 of the tweeter 21 is directed toward both the shielding device 22 and the shielding device 23, and it is noted that the first sound emitting surface 2111 is closer to the shielding device 23 and farther from the shielding device 22.

Referring to fig. 2 and fig. 3, the width of the shielding device 22 is W1, the height thereof is H1, the width of the shielding device 23 is W2, and the height thereof is H2, wherein the dimensions, proportions, and upper and lower limits of the

shielding devices

22 and 23 are shown below:

TABLE 1

Shielding device 22	Width W1	Height H1	Width/height (W1/H1)
				Dimension (mm) and ratio thereof of the present embodiment	20	7	2.86
Size (mm) and ratio thereof of the present embodiment	24	8.4	3.43
				Dimension (mm) and ratio thereof of the present embodiment	18	6.3	2.57

TABLE 2

Shielding device 23	Width W2	Height H2	Width/height (W2/H2)
				Dimension (mm) and ratio thereof of the present embodiment	11	3.8	2.89
Dimension (mm) and ratio thereof of the present embodiment	13.2	4.56	3.47
				Dimension (mm) and ratio thereof of the present embodiment	9.9	3.42	2.61

As can be seen from the above tables 1 and 2, the ratio W1/H1 of the width to the height of the shielding device 22 ranges from 2.57 to 3.43, and the ratio W2/H2 of the width to the height of the shielding device 23 ranges from 2.61 to 3.47.

Referring to fig. 3, in the present embodiment, an included angle θ 1 between the third surface 2133 of the magnet of the tweeter 21 and the first surface 221 of the shielding device 22 is smaller than 90 degrees.

The tweeter in the earphone is positioned near the ear, so it reaches the ear as a spherical wave, the frequency balance of the ear is changed by the change of the ear position, the high-pitched range is strong in the center of the tweeter, the low-pitched range is strong in the edge of the tweeter, so when the sound wave reaches the ear earlier in the area of the edge of the tweeter, the balance between the low frequency and the high frequency is changed, and the sound quality is also changed, therefore the invention arranges a shielding device 23 and a shielding device 22 in front of the tweeter 21, the sound wave is shielded by the shielding device 23 and the shielding device 22 to generate reflection and/or diffraction, the center part of the sound wave is delayed in propagation, and approaches to a plane wave when reaching the ear canal, and the phase is adjusted. In particular, since the positions of ears of different persons are slightly different, the present invention can make the sound waves reaching the auditory canal closer to plane waves, so that the present invention can ensure the consistency of the frequency characteristic changes of the sound waves reaching the auditory canal, and can generate a stable forward positioning effect, thereby providing excellent sound quality.

Referring to fig. 1, a plurality of sound holes, such as a first sound hole 201 and a second sound hole 202, are formed on the cover 203 of the housing 20, the shielding device 25 is disposed around the first sound hole 201, and the shielding device 26 is disposed around the second sound hole 202. When the earphone device is used, the bass unit 24 (shown in fig. 4 and 5) disposed in the housing 20 generates sound waves, the sound waves are transmitted out of the housing 20 through the first sound hole 201 and the second sound hole 202, and then are shielded by the shielding device 25 and the shielding device 26, respectively, to generate reflection and/or diffraction, and adjust the phase, so that the sound waves approach to plane waves when reaching the ear canal of the user.

Referring to fig. 4, fig. 4 is a schematic diagram of the earphone device cut along the section line IV-IV in fig. 2. As shown, the woofer 24 includes a vibration plate 241 and a magnetic return system 243, wherein the vibration plate 241 includes a first sound emitting surface 2411 and a second sound emitting surface 2413, the first sound emitting surface 2411 faces the cover 203, and the second sound emitting surface 2413 faces away from the first sound emitting surface 2411. The magnetic return system 243 is disposed on the side of the second sounding surface 2413, and includes a magnet having a third surface 2433 and a fourth surface 2431, the third surface 2433 of the magnet faces the second sounding surface 2413 of the vibration plate 241, and the fourth surface 2431 of the magnet faces away from the third surface 2433 of the magnet.

The shielding device 25 includes a first surface 251, a second surface 252, a first portion 254 and a second portion 253, wherein the first surface 251 is close to the first acoustic port 201, the second surface 252 is disposed opposite to the first surface 251, the first portion 254 is disposed between the first surface 251 and the second surface 252 and fixed to the cover plate 203, and the second portion 253 is disposed between the first surface 251 and the second surface 252 and disposed opposite to the first portion 254 and away from the cover plate 203. In this embodiment, an included angle θ 2 between the third surface 2433 of the magnet and the first surface 251 of the shielding device 25 is smaller than or equal to 90 degrees.

Referring to fig. 2 and fig. 4, the width of the shielding device 25 is W3, the height is H3, and the size, the ratio and the upper and lower limits of the shielding device 25 are shown below:

TABLE 3

Shielding device 25	Width W3	Height H3	Width/height (W3/H3)
				Dimension (mm) and ratio thereof of the present embodiment	7.4	5	1.48
Dimension (mm) and ratio thereof of the present embodiment	8.88	6	1.78
				Dimension (mm) and ratio thereof of the present embodiment	6.66	4.5	1.33

As can be seen from the above Table 3, the ratio W3/H3 of the width to the height of the shielding device 25 ranges from 1.33 to 1.78.

Referring to fig. 5, fig. 5 is a schematic diagram of the earphone device cut along the line V-V of fig. 2. As shown in the figure, the shielding device 26 includes a first surface 261, a second surface 262, a first portion 264 and a second portion 263, wherein the first surface 261 is close to the second sound hole 202, the second surface 262 is disposed opposite to the first surface 261, the first portion 264 is disposed between the first surface 261 and the second surface 262 and fixed to the cover plate 203, and the second portion 263 is disposed between the first surface 261 and the second surface 262 and disposed opposite to the first portion 264 and far away from the cover plate 203. In this embodiment, an included angle θ 3 between the third surface 2433 of the magnet and the first surface 261 of the shielding device 26 is smaller than or equal to 90 degrees.

Referring to fig. 2 and fig. 5, the width of the shielding device 26 is W4, the height is H4, and the size, the ratio and the upper and lower limits of the shielding device 26 are shown below:

TABLE 4

Shielding device 26	Width W4	Height H4	Width/height (W4/H4)
				Dimension (mm) and ratio thereof of the present embodiment	8.3	3.5	2.37
Dimension (mm) and ratio thereof of the present embodiment	9.96	4.2	2.85
				Dimension (mm) and ratio thereof of the present embodiment	7.47	3.15	2.13

As can be seen from the above Table 4, the ratio W4/H4 of the width to the height of the shielding device 26 ranges from 2.13 to 2.85.

Since the first sound hole 201 and the second sound hole 202 have a distance difference with respect to the auditory canal, and the balance of the frequency of sound waves arriving at the auditory canal after passing through the first sound hole 201 (closer to the auditory canal) and the second sound hole 202 (farther from the auditory canal) changes, the shielding device 25 and the shielding device 26 are disposed in front of the first sound hole 201 and the second sound hole 202 for phase adjustment to suppress the phase difference of sound waves generated by the woofer 24.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. An earphone device, comprising:

the shell comprises a shell body and a cover plate, wherein the cover plate comprises a first surface and a second surface, the first surface faces the shell body and is combined with the shell body to form an inner space of the shell body, and the second surface is back to the first surface and is far away from the shell body to be an outer part;

a sound generating device including a first speaker including a vibration plate including a first sound emitting surface facing the outside and a second sound emitting surface facing away from the first sound emitting surface;

the first shielding device comprises a first part, a second part, a first surface and a second surface, wherein the first surface faces the first sound-emitting surface, the second surface faces back to the first surface, the first part is arranged between the first surface and the second surface, the first part is fixed on the cover plate, and the second part faces back to the first part and is far away from the cover plate.

2. The earphone device as claimed in claim 1, wherein the sound generating device further comprises a second speaker and a third speaker, a projected area of the second speaker on the cover plate has a first center point, a projected area of the third speaker on the cover plate has a second center point, and a perpendicular bisector of a connecting line between the first center point and the second center point passes through the first speaker.

3. The earphone device according to claim 1, further comprising a second shielding device, wherein the cover further comprises a supporting member, the supporting member comprises an end portion, the end portion is connected to the second surface of the cover, the second shielding device comprises a third portion and a fourth portion, the third portion is fixed to the end portion of the supporting member, and the fourth portion is disposed away from the third portion.

4. The earphone device as claimed in claim 3, wherein the second shielding means is disposed between the first shielding means and the vibrating plate of the first speaker, the first sound-emitting surface of the vibrating plate of the first speaker faces both the first shielding means and the second shielding means, and the first sound-emitting surface is closer to the second shielding means than to the first shielding means.

5. The earphone device as claimed in claim 3, wherein the ratio of the width to the height of the first shielding means is in the range of 2.57 to 3.43, and the ratio of the width to the height of the second shielding means is in the range of 2.61 to 3.47.

6. The headphone apparatus as claimed in claim 1, wherein the sound generating apparatus further comprises a magnetic return system, the magnetic return system comprises a magnet, the magnet has a third surface and a fourth surface, the third surface of the magnet faces the second sound generating surface of the vibrating plate, the fourth surface of the magnet faces away from the third surface of the magnet, and the third surface of the magnet forms an angle smaller than 90 degrees with the first surface of the first shielding means.

7. An earphone device, comprising:

the shell comprises a shell body and a cover plate, wherein the cover plate comprises a first surface and a second surface, the first surface faces the shell body and is combined with the shell body to form an inner space of the shell body, the second surface is back to the first surface and is far away from the shell body to be an outer part, and a first sound hole is formed in the cover plate;

the sound generating device comprises a first loudspeaker, the first loudspeaker comprises a vibrating plate, the vibrating plate comprises a first sound generating surface and a second sound generating surface, the first sound generating surface faces the first surface, and the second sound generating surface faces away from the first sound generating surface;

the first shielding device is arranged at the periphery of the first sound hole and comprises a first part, a second part, a first surface and a second surface, the first surface is close to the first sound hole, the second surface faces back to the first surface, the first part is arranged between the first surface and the second surface, the first part is fixed on the cover plate, and the second part faces back to the first part and is far away from the cover plate.

8. The headphone apparatus as claimed in claim 7, wherein the sound generating apparatus further comprises a magnetic return system, the magnetic return system comprises a magnet, the magnet has a third surface and a fourth surface, the third surface of the magnet faces the second sound generating surface of the vibrating plate, the fourth surface of the magnet faces away from the third surface of the magnet, and the third surface of the magnet forms an included angle smaller than or equal to 90 degrees with the first surface of the first shielding means.

9. The earphone device as claimed in claim 7, wherein the ratio of the width to the height of the first shielding means is in the range of 1.33 to 1.78 or 2.13 to 2.85.

10. An earphone device as claimed in claim 1 or 7, wherein the first shielding means comprises a sound wave shielding plate.